updated Travis settings file

Author: chrissimpkins

.travis.yml

@@ -6,23 +6,17 @@ matrix:
   include:
     - python: 2.7
       env: TOX_ENV=py27
-    - python: 2.7
-      env: TOX_ENV=py33
     - python: 2.7
       env: TOX_ENV=py34
     - python: 3.5
       env: TOX_ENV=py35
     - python: 3.6
       env: TOX_ENV=py36
-    - python: pypy
-      env: TOX_ENV=pypy
-    - python: pypy3
-      env: TOX_ENV=pypy3
 
 script: tox -e $TOX_ENV
 
 install:
     - pip install tox
 
 notifications:
-  email: false
+  email: false